MPU4 maintenance

[jonhughes]

After repairing my Crystal Maze machines I decided I would do a spot of maintenance. I think I have just caught these in time. In my first board battery one is deciding whether to spill its guts out over the PCB. In my second board battery two has already gone for it. The cathode pin had fused to the soldering eye and took about 10 minutes of flux heating to remove the thing. The innards also caught a few components, lucky though not enough to kill anything.

Keep an eye an out for these wretched on board batteries.

And replaced!

 

[Purity]

It still looks like you have battery leakage on the board to me. Especially in the 3rd picture, and on that transistor, and on the resistors.

 

[stevebm1]

I gave my one a vinegar bath to kill the acid when I had an mpu4 fruity

 

[jonhughes]

It still looks like you have battery leakage on the board to me.  Especially in the 3rd picture, and on that transistor, and on the resistors.

Think you're right, I'll have to do some extra cleaning. It looks like the fragments I plucked of the resistors are still clinging to the board in places.

 

[Purity]

I think you might need to remove that transistor, as the legs look green, then clean the area with white vinegar and wash it off with destilled water

 

[Ronnie Dent]

Best not fit new battery to the board, I fly lead all mine outside the board, no future chance of a leak

 

[Purity]

Best not fit new battery to the board, I fly lead all mine outside the board, no future chance of a leak

I need to do exactly the same on my jukebox. The main PCB has a varta battery on it like this, with 3 legs. I want to stick in on a remote board somewhere

 

[jonhughes]

Best not fit new battery to the board, I fly lead all mine outside the board, no future chance of a leak

I need to do exactly the same on my jukebox.  The main PCB has a varta battery on it like this, with 3 legs.  I want to stick in on a remote board somewhere

Yes, you've given me an idea on that. The next time I have some free time I'm going to create something that I can plug a new battery in and out of. I could solder wires to the battery but I'll come up with something.

 

[Purity]

Yes, you've given me an idea on that. The next time I have some free time I'm going to create something that I can plug a new battery in and out of. I could solder wires to the battery but I'll come up with something.

I'm doing exactly this on a vero board or something similar